Rename can_be_published? to parent_allows_publishing?

As per #11431 (review)
This is more descriptive.

Author: ChrisBAshton

app/components/admin/editions/show/sidebar_actions_component.rb

@@ -23,7 +23,7 @@ def actions
       add_create_action
       add_edit_action
       add_submit_action
-      unless @edition.is_child_document? && !@edition.can_be_published?
+      unless @edition.is_child_document? && !@edition.parent_allows_publishing?
         add_unschedule_action
         add_schedule_action
         add_publish_action

app/models/concerns/standard_edition/child_document.rb

@@ -21,7 +21,7 @@ def is_child_document?
     parent_edition.present?
   end
 
-  def can_be_published?
+  def parent_allows_publishing?
     return true unless is_child_document?
 
     parent_edition.document.live_edition&.state == "published" && !parent_edition.pre_publication?
@@ -34,7 +34,7 @@ def publishing?
   end
 
   def ensure_publishing_is_allowed!
-    return if can_be_published?
+    return if parent_allows_publishing?
 
     raise IncompatibleParentState, "Unable to publish child document"
   end

app/views/admin/editions/show.html.erb

@@ -21,7 +21,7 @@
   if @edition.is_child_document?
     parent = @edition.parent_edition
     inset_text = "This is a child document of <a href='/government/admin/editions/#{parent.id}'>#{parent.title}</a>."
-    if !@edition.can_be_published?
+    if !@edition.parent_allows_publishing?
       if @edition.parent_edition.document.live_edition&.state == "published" && @edition.document.live_edition.nil?
         inset_text += " As this is a new document, you will need to publish the parent again first before you can publish the child."
       else

test/unit/app/models/concerns/standard_edition/child_document_test.rb

@@ -86,7 +86,7 @@ class StandardEdition::ChildDocumentTest < ActiveSupport::TestCase
     assert_equal "#{parent_edition.base_path}/foo", child_edition.base_path
   end
 
-  test "can_be_published? returns true if parent edition is not in a pre-publication state AND parent document is 'published'" do
+  test "parent_allows_publishing? returns true if parent edition is not in a pre-publication state AND parent document is 'published'" do
     parent_document = create(:document)
     parent_edition = create(:superseded_standard_edition, document: parent_document)
     create(:published_standard_edition, document: parent_document) # Live Parent
@@ -100,10 +100,10 @@ class StandardEdition::ChildDocumentTest < ActiveSupport::TestCase
     )
     relationship.save!(validate: false)
 
-    assert child_edition.can_be_published?
+    assert child_edition.parent_allows_publishing?
   end
 
-  test "can_be_published? returns false if parent edition is in a pre-publication state, despite the parent document being published" do
+  test "parent_allows_publishing? returns false if parent edition is in a pre-publication state, despite the parent document being published" do
     Edition::PRE_PUBLICATION_STATES.each do |state|
       parent_document = create(:document)
       create(:published_standard_edition, document: parent_document) # Live Parent...
@@ -117,11 +117,11 @@ class StandardEdition::ChildDocumentTest < ActiveSupport::TestCase
         child_document:,
       )
 
-      assert_not child_edition.can_be_published?
+      assert_not child_edition.parent_allows_publishing?
     end
   end
 
-  test "can_be_published? returns false if parent edition is not in a pre-publication state and parent document is not 'published'" do
+  test "parent_allows_publishing? returns false if parent edition is not in a pre-publication state and parent document is not 'published'" do
     parent_document = create(:document)
     parent_edition = create(:withdrawn_standard_edition, document: parent_document)
     create(:draft_standard_edition, document: parent_document)
@@ -135,6 +135,6 @@ class StandardEdition::ChildDocumentTest < ActiveSupport::TestCase
     )
     relationship.save!(validate: false)
 
-    assert_not child_edition.can_be_published?
+    assert_not child_edition.parent_allows_publishing?
   end
 end